This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Which of the following is not true regarding a concave function? a. It is bowl-shaped down. b. It ... (Read 205 times)

bobbysung

  • Hero Member
  • *****
  • Posts: 519
on: Jun 24, 2018
Which of the following is not true regarding a concave function?
 a. It is bowl-shaped down.
  b. It is relatively easy to maximize.
  c. It has multiple local maxima.
  d. It has a single global maximum.

Question 2

The makers of Compute-All know that in the past, 40 of their sales were from people under 30 years old, 45 of their sales were from people who are between 30 and 50 years old, and 15 of their sales were from people who are over 50 years old. A random sample of 300 customers was taken to see if the market shares had changed. In the sample, 100 of the people were under 30 years old, 150 people were between 30 and 50 years old, and 50 people were over 50 years old.
 a. State the null and alternative hypotheses to be tested.
  b. Compute the test statistic.
  c. The null hypothesis is to be tested at the 1 level of significance. Determine the critical value from the table.
  d. What do you conclude?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jgranad15

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jun 24, 2018
Answer to Question 1

C

Answer to Question 2

a. H0: p1 = .4, p2 = .45, and p3 = .15
Ha: The population proportions are not p1 = .4, p2 = .45, and p3 = .15
b. 5.55
c. 9.21034
d. Do not reject the null hypothesis. There is not enough evidence to conclude that the market share has changed.


bobbysung

  • Hero Member
  • *****
  • Posts: 519
Reply #2 on: Jun 24, 2018
Thank you :)


jgranad15

  • Sr. Member
  • ****
  • Posts: 345
Reply #3 on: Jun 24, 2018
Happy to help you


« previous next »
 

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

How to reflect the quadratic function relative to the x-axis How to reflect the quadratic function relative to the x-axis
How to vertically shift a sinusoidal function (y=a*sin⁡b(x−c)+d) How to vertically shift a sinusoidal function (y=a*sin⁡b(x−c)+d)
Hepatic Acinus Model of Liver Function Hepatic Acinus Model of Liver Function
Graph to Function Cosine Graph to Function Cosine
Integral of function p1 Integral of function p1
Derivative of Inverse Trig Function Derivative of Inverse Trig Function
Video: Osteoporosis

For a complete list of videos, visit our video library